F(x)=8x^2-5x+90

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Solution for F(x)=8x^2-5x+90 equation: 



(F)=8F^2-5F+90

We move all terms to the left:

(F)-(8F^2-5F+90)=0

We get rid of parentheses

-8F^2+F+5F-90=0

We add all the numbers together, and all the variables

-8F^2+6F-90=0

a = -8; b = 6; c = -90;
Δ = b2-4ac
Δ = 62-4·(-8)·(-90)
Δ = -2844
Delta is less than zero, so there is no solution for the equation

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